The active has two pieces to it. There's a rubber type material that goes on first, then a harder shell (that's kind of soft to the touch) that goes around the rubber to make it more solid. I believe the harder shell is the same material that the Innocase II is made from.

I've owned several of their cases, I would recommend staying away from their Innocase II. Spend 30 minutes on this forum and google it, you will see why.

I currently own the Active and I am very happy with it.

Their website says the Innocase II adds 1 mm and the active 2.2 mm... but everyone's going to have a different opinion on how it feels to them. I think the Active feels solid and much better.